US2666851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency generator with phase shifter
Assignee: TESLA SLABOPROUDE A RADIOTECHN
•
Filing: 1948-02-03
•
Granted: 1954-01-19
•
Expires: 1968-02-03
Abstract
No abstract record available.
Inventors
- 👤 Carniol Bohdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030113A
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US2135051A
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US2147723A
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US2268872A
Cited
US2446821A
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US2451858A
Cited
US2439245A
Cited
US2516906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |